HDMI2C2-14HD Datasheet, PDF (27/31 Pages) STMicroelectronics – ESD protection and signal booster for HDMI™ 1.4 sink interface

HDMI2C2-14HD
Recommendation on PCB assembly
5
Recommendation on PCB assembly
5.1
Stencil opening design
1. General recommendation on stencil opening design
a) Stencil opening dimensions: L (Length), W (Width), T (Thickness).
Figure 27. Stencil opening dimensions
L
TW
b) General design rule
Stencil thickness (T) = 75 ~ 125 µm
Aspect Ratio = ^W-T---- ≥ 1.5
Aspect Area = _2----T---L-(---L-^×---+--W---W-------₎ ≥ 0.66
2. Reference design
a) Stencil opening thickness: 100 µm
b) Stencil opening for central exposed pad: Opening to footprint ratio is 50%.
c) Stencil opening for leads: Opening to footprint ratio is 90%.
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